//go:build windows

package version

import (
	"fmt"
	"os/exec"

	"golang.org/x/sys/windows"
)

func processAlive(pid int) bool {
	if pid <= 0 {
		return false
	}
	handle, err := windows.OpenProcess(windows.SYNCHRONIZE, false, uint32(pid))
	if err != nil {
		return false
	}
	defer windows.CloseHandle(handle)
	status, err := windows.WaitForSingleObject(handle, 0)
	return err == nil && status == uint32(windows.WAIT_TIMEOUT)
}

func processIdentityToken(pid int) (string, error) {
	if pid <= 0 {
		return "", fmt.Errorf("invalid process ID %d", pid)
	}
	handle, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION|windows.SYNCHRONIZE, false, uint32(pid))
	if err != nil {
		return "", err
	}
	defer windows.CloseHandle(handle)
	var creation, exit, kernel, user windows.Filetime
	if err := windows.GetProcessTimes(handle, &creation, &exit, &kernel, &user); err != nil {
		return "", err
	}
	return fmt.Sprintf("%08x%08x", creation.HighDateTime, creation.LowDateTime), nil
}

func processMatches(pid int, expectedToken string) bool {
	if !processAlive(pid) {
		return false
	}
	if expectedToken == "" {
		return true
	}
	actualToken, err := processIdentityToken(pid)
	return err == nil && actualToken == expectedToken
}

// Windows CommandContext terminates the directly executed identity probe on
// cancellation. The manager identity command does not launch a helper tree.
func configureIdentityCommand(*exec.Cmd) {}